Carburetor



Sept. 8, 41925. 1,552,623

C. c. LITTLE CARBURETOR FiledApril 18, 1921 '-*IGURE 3.

lNvEN'ToR ATTORNEY a citizen of the United Stat s, and resident of y San Jose,.in the county o Santa Clara and State of California, haveinvented certain'l simple and economical construction in which' the air passes through a single opening immediately over the fuel nozzle with a mini` mum amount of lresistance to its passage. A.

j Patented Sept. 8, 1925. e

CHARLESC. LITTLE, or sAN JOSE, cALIroRNIA.

CABBURETOR.

Application mea April 13, 1921. serial No. 462,280.,

To all 'who/m y'it may conservi.:

Be it known that I, CHARLES C.v LiT'rLE, a

new and useful Improvementsin Carburetors, of which the 'following is a specification.y l

My invention relates particularly to the air valve mechanism of a carburetor and v it has for its object toprovide a carburetor of further object is to provide ecient means for preventing uttering of the airvalve. 'ln the drawings Figure 1 is av vertical sectional. view throughl a carburetor embodying my invention. M 'f Figure 2 is a horizontal sectional view on line 2-2 of Figure 1 with the float omitted. Figure 3 is ag vertical sectional view through another embodiment of my invention.

Figure 4 is aplan view ofanother embodiment of one member of the'valve mechamsm.

Figure 5 is still another embodiment of the member shown in'Figure 4.

Referring more yin detail to the drawing the numeral 1 indicates the casing, 2 the throttle, 3 the Hoat chamber, and 4 thevfuel nozzle of al carburetor leading into' a carhureting chamber into which' also leads an air intake 6, the two side walls of the carbureting chamber and air v'intake being arrangedin parallel relation to each other 94S, Sl'lOWD.'

A flat resilient valve 7 -is fixedly secured to casingl at the air intake end 6, as at 8, and

extends inwardly and downwardly toward side edge of member The same result i may be obtained in a number of diierent ways, ysuch `as the notches 14 in the 'edges of member 10', (Fig. 4), vor a pluralityof ori- 60 I' fices 15 maybe provided in the member -as shown Yin Fig. 5.

Disposedl'within the chamber 12 and above the valve is a resilient controlling member 16 which is attached to the casingat 8 and 6 5 may be adjusted by means of an arm 17 piv' otally mounted by a lshaft 18.having an operating^ lever 19. In operation, suction'- within vthe carburetor causes the resilient valve 7, and its con- 'I ynecte'd member 10 to move upwardly to some such point, as for example, that indicated by the dottedlines 7a and 10a. lheopening of l`the valve, under any given degree of suction, is controlled bythe members 16, 17 and 1 9, 75

the upward curve at the free or inner end of the valve being such that the greatest constriction of the' passage will always -fbe directly opposite orfabove the fuel nozzle at' all valve positions.

and the top wall of the chamber to prevent back pressure entering chamber 12 around the4 free end lof said' member 1Q. The openings v13 provide a consid- 90 erable frictional resistance to the passage den increase of suction were to occur in the 95 carbureting chamber, the valve would b rapidly lifted, and lwould tend to Hy beyond its normal position forl that suction because of itsinertia.. The chamber 12 forms acushl Member 10 forms an 80 `expandingpassage with the wall 7,10, some what like a venturi, guards the valve against` injury in case of-an explosion within the carburetor, and completes the boundaries of" i the chamber 12.- The pocket 11 provides a 8 5 sealed joint between the member 10 l the nozzle 4, todirect., inflowing air therecushion chamber 12 which has restricted ion for such sudden movements of the 100* .valve.

ln using my invention l am not confined yto the use of a resilient valve. linfFigureA l l show'an inflexible valve 20, pivotally mounted at 21, and pro-vided 'with acurved105 surface 25 on its back. A' spring 22, ati tached4 to the casing at 23, carries a roller 211 for contacting vwith the curved surface FV-5:

25 whereby' on operation of shaft18 by' lever 19 the arm 17 will press down vonto 110 -sprlng 22 and accordingly adjust the.valve.

20- The free end 0f the latteris connected over, saidvalve fitting between the' `walls of the casing as closely as possible to permit its rtree motion. The inner or free end of valve 7 is'curved upwardly, as at 9, and hinged thereto is a dat member 10 which also lits closely between the walls of casing' 1 and has its opposite 'end slidably guided 'by walls 11, into a pocket 11 formed in casing 1 as shown. .These two dat members 7 4and 10, in conjunctlon with the casing 1, form an air communication through a groeve 13 in each tothe closure 10 for chamber 12 as in the preferred embodiment.

As fluctuations in air pressure occur in chamber 5 the valve will yield tothe extent determined by the setting of lever 19, andas the valve yields, the air within chamber 12 may find ready exit through'the openings 13. lVithoutthese eXcape passages the acti'onof the valve would be uncertain. It is to be noted, `however, that Vthese passages are so restricted asvto permit the airwithin chamber -12 to cushion the valve upon sudden or quick movements thereof.

I claim- 1. In a carburetor, a carbureting chamber,

' a fuel nozzle leading thereinto, a resilient valveV arranged within the chamber with its free end extending across the chamber to- Ward the nozzle,-and a member hinged to the free end of the valve and deiining therei with and .with the adjacent walls of t-he chamber an air chamber providing a cushion for the valve and member, said air chamber havin a vent. y

` 2. n a carburetor, a `carbureting chamber, a fuel nozzle leading thereinto, a resilient valve arranged within the chamber with its free end extending across the chamber toward the nozzle and a member hinged to the free end of the valve and defining therewith and with the adjacent walls of the chamber an air chamber providing a cushion for the valve and member, said member hav*- ing a restricted opening establishing communication between the two chambers.

CRLES C. LITTLE. 

